Hellenic Cadastre: The Most Common Errors Risking Property Owners' Rights

Even the slightest error in data submitted to the Hellenic Cadastre (Hellenic Land Registry) can have serious consequences for property owners. According to a report by the newspaper «Τα Νέα» (Ta Nea), a simple inaccuracy can obstruct property transfers or the issuance of building permits, while in extreme cases, it could even lead to the loss of ownership rights.

As the completion process of the Hellenic Cadastre progresses, numerous issues related to the incorrect registration of rights and the erroneous recording of property status for thousands of citizens are coming to light. According to experts, one of the primary issues is that these errors usually go unnoticed during the initial registration phase. Consequently, in areas where the Cadastre has already been finalized, massive discrepancies—reaching up to 50%—are recorded between the actual surface area of properties and the data stored in the digital database.

As topographical engineer Grammati Baklatsi points out, these problems usually surface when the need arises for the substantive development or utilization of the property.

Causes and Identification of Errors

The most common causes for inaccuracies in the Cadastre include the lack of clearly defined boundaries on the ground (such as the absence of fences or natural markers), the use of old topographical surveys based on imprecise measurement methods, and legacy contracts where areas are cited "approximately" (e.g., "roughly two stremmata"—a Greek unit of land measurement where 1 stremma equals 1,000 square meters). Furthermore, discrepancies often arise between the area stated in the title deed and the area calculated from the Cadastre’s digital background.

In practice, these errors are identified in several ways. For instance, an owner may discover that their plot appears significantly smaller in the Cadastre records compared to their title deeds. In other cases, disputes arise between neighbors because the digital mapping shows a different boundary line than what was previously recognized.

Most Frequent Geometric Errors

Errors in geometric data are not random and are primarily categorized into two main forms:

Area Errors: Owners find that the declared area is smaller or larger than what is specified in the contract. This is mainly due to the lack of modern topographical measurements, vague references in old contracts, and the discrepancy between declared and digitally calculated surface areas. A characteristic example is a case where an owner declares 1,000 square meters, but only 920 are ultimately registered in the Cadastre.

Location Errors: In this category, properties appear "shifted" on digital maps. As a result, they may appear to "encroach" on neighboring properties or lose a portion of their own actual area. This specific dissonance is caused by the absence of precise coordinates, rough mapping during the initial property declaration, and the lack of clear, visible boundaries on the ground itself.

Due to the aforementioned errors, properties often present a distorted image, necessitating recourse to correction procedures or, if required, the judicial system, to ensure the unhindered protection of citizens' assets.